Answer:
Fear
Explanation: fear because if they create fear people will be willing to do what these terrorist groups want them to do such as partake in a new religion, join them, etc.
During the Crusades, VeneTan ships carried Crusaders east and brought back riches from these countries.
This led to the development of many trading centers that operate in trading various type of commodities internationally, which led to economic Growth all across Europe.<span />
The Volstead Act was what established the Prohibition Act, and American's obviously did not enjoy this due to not being able to import and transport
